Saturn was introduced in 1997 by East Malling Research Station in Kent, England. Saturn is a medium-sized apple, smooth, rounded and with a lime green skin, largely covered in a deep red flush. The flavour is particularly good. It is sweet but with a hint of acidity and the sweetness is not sugary-sweet. It is firm to the bite, but the flesh snaps cleanly, and is very juicy. Saturn has been bred with disease resistance in mind and is a cross between Stark-Spur and a research variety PRI1235.